Steam-boiler



No. 68,332. Patented Nov. I898.

W. C. TEMPLE.

STEAM BOILER.

(Application filed Oct. 28, 1897.) (No Model.)

2 Sheets-Sheet l.

THE mmms Perms ca. wore-un o" wwnmomu, n, cy

8 9 8 V 0 N d e t n 9 t a P W. C. TEMPLE.

STEAM BOILER.

(Application filed Oct. 28, 1897.)

2 SheetsSheet 2.

(No Model.)

mvsm'on WITNESSES m5 Nonms PEYERS my. FHOTO-LITHO.. WAsnmuToN. a. c

UNITED STATES PATENT OFFICE.

WILLIAM C. TEMPLE, OF PITTSBURG, PENNSYLVANIA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 613,332, dated November 1, 1898. Application fil d October28, 1897. Serial No. 656,654. (No model.)

To ctZZ 'LUhOWb it nuty concern:

Be it known that 1, WILLIAM C. TEMPLE, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Steam-Boilers;

and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, inwhich- Figure 1 is a vertical central section of my improved boiler, and Fig. 2 is a horizontal section on the lines 11 II of Fig. 1.

My invention relates-to improvements in steam-boilers, particularly of that class to which belongs the Oahall boiler, shown in Patent No. 485,088, granted to John Cahall on October 25, 1892.

The object of my invention is principally, first, to provide for the easy removal of soot, ashes, and other foreign matters that deposit upon the tube-sheet of the mud-drum in this class of boiler, and, secondly, to so arrange the exterior shell in its relation to the metal portion of the boiler as to allow free expansion of the latter and at the same time to render the construction practically tight against the admission of outside cold air into the smoke-flue or into contact with the heating-surfaces.

My improved boiler has a combustionchamber and an annular mud-drum, beneath which is a pit or chamber for the accum ulation of foreign substances which may from time to time deposit on the tube-sheet of the mud-drum and which are blown or forced thence through the central vertical space in the mud-drum down into the chamber be-' neath.

In the drawings, 2 designates the external masonry shell of the boiler. 3 is an annular steam-drum arranged within said shell, near or at the upper end thereof, and connected by a concentric bank of water-tubes 5 with an annular mud-drum 4, arranged at or near the lower portion of the shell. The annular steamdrum 3 is provided with a central vertical flue 6, opening into a stack 6. The annular drum at has a vertical opening 7, which communicates at its lower end with a pit 8 and at its upper end communicates with the central vertical space 9, which is within the bank of tubes and Which connects at its upper end with the central opening through the steam drum.

10 is the combustion-chamber, which discharges its gases and products of combustion laterally among the tubes above the muddrum. 11 11 are deflectors, one or more in number, arranged to retard the passage of these gases in their vertical travel through the boiler. The opening 7 in the mud-drum is not a flue for the passage of the products of combustion, for these enter the heatingspace of the boiler not through the said opening, but above the same.

The boiler is supported by the mud-drum, which rests upon or is upheld by the foundation of the masonry structure. Between the steam-drum and the external wall or shell 2 I place a packing-ring 12, of asbestos rope or other suitable material, which serves to close the space between the drum and the shell and yet is elastic and yielding enough to permit the rise and fall of the whole boiler structure, due to its natural expansion and contraction,without binding or straining the shell.

By the construction above describedI provide simple and effective means for relieving strains upon the shell incasing the boiler, which might be occasioned if the shell were in contact with the upper portion of the boiler, at which portion the results of such contraction and expansion are the greatest, and I effect this result without in any way injuring 'or lowering the efficiency of the boiler or affording any space for the admis sion of cold air into contact with the steamspaces, and I moreover provide for the easy and ready removal of foreign matter, which will fall from the tube-sheet of the mud-drum into the pit 8. A further advantage appertaining to the annular construction of the steam drum and muddrum is that these drums are rendered very strong and capable of resisting great strains without the necessity for using special internal braces.

I claim- 1. A vertical water-tube boiler having annular steam and mud drums, a connecting vertical bank of tubes, and a combustionchamber discharging its gases and products of combustion laterally among the tubes above the mud-drum, the course of the gases being upwardly and not through the muddrum, substantially as described.

2. A vertical boiler having an exterior shell, an annular mud-drum arranged at the lower part of said shell, a steam-drum at the top part of the exterior shell provided with a central vertical smoke-flue which communicates with the stack of the boiler, a concentric bank of water tubes connecting the steam drum and mud drum, a combustion-chamber discharging its gases and products of combustion laterally among the tubes above the muddrum, the course of the gases being upwardly and not through the mud-drum, and one or more deflectors arranged within the central vertical space, between the tubes, substantially as described.

3. A boiler having an exterior shell, a muddrum, a steam-drum arranged within and at the upper part of the exterior shell but not in contact therewith, a surrounding packing of yielding material adapted to close the space between the steam drum and the exterior shell and to permit vertical motion of the steam-drum, and a support below the steamdrum for supporting the boiler, substantially as described.

4. A vertical water-tube boiler having a bank of tubes, an annular mud-drum, and a combustion-chamber discharging its gases and prod ucts of combustion laterally among the tubes above the mud-drum the course of the gases being upwardly and not through the mud-drum; substantially as described.

In testimony whereof I have hereunto set m y hand.

\V. C. TEMPLE.

Witnesses:

G. I. HOLDSI-IIP, II. M. CORVVIN. 

